Język Polski
English
Published
: 2022-09-18
The POLYFLOW system studies on the effect of flow conditions on the extrudate swell
Abstract
The POLYFLOW techniques were applied to model the polymer stream (Barrus effect, free surface problem) that leaves the shaping channel, e.g., an extruder head, in an isothermal viscous and in a viscoelastic flow. The viscous Newtonian and generalized Newtonian (in terms of Bird-Carreau's model) flows and the viscoelastic flow were modeled, the latter by using the differential Maxwell and the integral Kaye-Bernstein-Kearsley-Zapas (KBKZ) models. Extrudate swell was studied in relation to polymer flow rate, shaping-channel geometry, and material model (Figs. 6-9). Results were in fair agreement with experiment tal data. The simple (two-parameter) Maxwell equation proved to be the most suitable rheological equation to model the extrudate swell, except at high flow rates where some limitations arise.
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Wilczyński, K., Szymaniak, Z., & Nastaj, A. (2022). The POLYFLOW system studies on the effect of flow conditions on the extrudate swell. Polimery, 47(2), 130–135. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1954
